Gumming device for envelop, bag, and the like making machines.



R. E. FISCHER & M. WESGHER. GUMMING DEVICE FOR ENVELOP, BAG, AND LIKEMAKING MACHINES. APPLIUATION FILED MAR.5, 1908 959,493. Patented May 31,1910.

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,RQBEBT ERNST FISCHER AND MAX NiilSKJi-l:ER, F IELBERFELD, GERMANY.

GUMMING'DEVICE FOR ENVELOP, BAG, AND LIKE MAKING MACHINES.

sea res.

Specification of Letters Patent.

Application filed March 5, 1908.

Patented May 31, into.

Serial No. 419,294.

To all whom it may concern: 1

Be it known that we, Ronnn'r EnNs'r 'FISCHER, engineer, and MAX""Wnsonnn,

engineer, citizens of the German Empire, and residents of 35Sandstrasse, Elberfeld, (irerinany, have invented newand usefulImprovements in Gumming Devices fonEnvelop, Bag, and Like MakingMachines, of which the following is a specification.

This invention relates to a guniming device for envelop making, bagmaking and like machines working with rotatin rolls in which theadhesive is transferre by a feeder from a gumining roll to the trans--up a large amount of gum.

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In throwing out of ear the machine from which also the gum 'eeder mustbe disengaged it -may happen that the feeder remains in that position inwhich it'oontacts' with the gumming roll. This has as-a consequence thatthe feeder lifts the gum from the gumniing roll, particularly when inthe out of gear position of the machine the gumming rolls are allowed tor which is very desirable for preventing the gum from drying. In orderto avoid this disadvantage the gumming device is provided with anarrangement which makes it possible-to dis-, engage the feeder so thatit will remain in a predetermined position and on engagement is so setautomatically that on rotation .it contacts with the gum carrier properof the transferring roll.

The gumming device is illustrated in the drawing in which Figure 1 showsthe same in the position in which the gum is being taken from the roll,while Fig. 2 shows the transferring of gum to the gum carrier proper ofthe transferring roll. Fig. 3 shows the driving mechanism for the rollsand the feederf Figs. 4 and 5 show in plan the stop motion device forthe feeder, Fig. 4' showing the shaft.

same with the feeder engaged and Fig. 5

showing the feeder disengaged.

Referring to the drawing a is a gum reservoir in which runs a roll 6.

c is a second roll touching the roll 5 and rotating in an oppositedirection, which is attained as may be seenfrom Fig. 3 by the cross-belta passing around the pulleys B and 6 fixed to the shafts of the-rollshand 0.

dis the feeder the rear edge of which is higher than the front edge soas to form a groove f for holding the gum scraped oil by the edge e fromthe roll 0. The feeder d is rotated by means of the pulleys d and f andthe cross belt 5 in the opposite direction to the roll 0. The pulleys (land 7 have the same diameter. The number of rotations of the roll c andthe feeder d is therefore the same, but as the radius of the roll 0 issmaller than the distance between the scraping edge e and the center ofrotation of the feeder, the circumferential velocity of the feeder (Z isgreater than the circumferential velocity of the roll 0. in consequencethe gum is scraped ofi by the feeder from the roll 0.

h is the transferring roll proper with the gum carrier m, which takes upthe gum from the groove fend transfers it to the paper passing betweenthe rolls h and h The rotation of the roll 71. is transferred by meansof the pinions C and H (Fig. 3) to the feeder (Z and by means of thesame pinion C to the pinion D of the lower roll it. The diameter of thepinions C, H, I), being the same the number of rotations of the feederas well as of the roll it and h is always the same. Y I

Inthe disengaging or uncoupling device shown in Figs. at and 5 2' is theshaft onone end of which is secured the roll h. On the other end of theshaft 2' is loosely mounted a pinion H which may be coupled with saidFor this purpose said shaft is pro'" vided with a clutch Z which is soconnected with the shaft by a feather and key-way that it can slide inthe longitudinal direcshown in Fig. 4. When the pinion H is driven itsrotary movement may be transmitted by, the pin m to the clutch Z andthrough said clutch to the shaft so that the feeder d is operated. Theclutch Z has an annular groove in which runs a roller n, connected by apin p with a' rod g. The rod g and the roller n connected therewith areforced by a spring 1" toward the pinion H but can be held by a pin itfitting in a notch in the rod 9. If the rod 9. is pulled to the rightand secured as shown in Fig. 5, on

. the gum from the roll 0.

In order to prevent the shaft 2' from rotating by the friction of therotatin pinion H after disengagement, the clutch Z is provided withanother lug u which immediately after disengagement comes in contactwith a pro-' jection w fitted on the bearing 1). When the feeder is tobe again engaged, the pin t is withdrawn from the notch s of the rod 9,whereupon the spring 1' tends to draw the roller 1 toward the pinion H.If on rotation of the pinion H the pin m comes opposite the groove onthe clutch I it snaps into this, coupling being thus effected and thefeeder being again engaged. It is clear,

that the feeder remains continuously in this position and on engagementcomes into the same position relative to the continuously rotatingpinion H.

What We claim as our invention and desire to secure by United StatesLetters Patent 'is: I

1. In a gumming device of the character described, the combination ofv agumming roll, a transferrin roll, a rotary feeder for feeding adhesivemm the gumming'roll to the transferring roll, and means for rotatingsaid feeder in a direction opposite to that of the gumming roll and at agreater circumferentlal velocity than the gumming roll, whereby theadhesive 'is scraped off of thegumming roll by said rotary feeder.

2. In a gumming device of the character described, the combination of agumming roll, a transferring roll, a roll cooperating therewith, saidrolls having complementary engaging elements, and a rotary feeder forfeeding adhesive from the mmin roll to the transferring roll; saidfeeder being provided with a scraping edge adapted to scrape theadhesive off the gumming roll and having a pocket adjacent to thescrapin edge ing adhesive from the gumming roll to the engaging elementof the transferring roll, a shaft on which the feeder is mounted, a

driving" member for the shaft, and means whereby the driving member canbe coupled to and uncoupled from the shaft; said means being efiectiveto bring the feeder into proper relative position with said engagingelement of the transferring roll.

4. In a gumming device of the character described, the combination of agumming roll, a transferrinroll, a rotary feeder-for feeding adhesive omthe gumming roll to the transferring roll, a shaft on which the feederis mounted, a drivin member loosely mounted on said shaft, and meanswhereby the driving member can be coupled to and uncoupled from theshaft; said means comprising a coupling member slidably mounted on theshaft, normally engaging the driving member and provided with a camface, and a movable member adapted to be brought into position to beengaged by the cam face of the coupling member to cause the couplingmember to be withdrawn from the driving member.

In testimony whereof we have signed our names to th s specification 1nthe presence of

